I play through the PS2 version a handful of times a year. I think I've run through it about 20 times now since 2012. It's become a "podcast game" for me lately.
Based on the handful of recorded-off-screen gameplay videos circulating, it looks like a near 1:1 remake of the PS2/3 versions.
They added a mount-from-behind the horse animation? And maybe tweaked some of the other animations. Running looks less ballerina-ish.
Small list of some practical stuff I'm hoping comes with this release:
- Photo Mode a la Last of Us Remastered, Infamous Second Son, etc.
- Ability to completely disable the HUD
- Leaderboard for time attacks.
- Some way of keeping the Ico "I" on Agro's forehead. Not sure how they'd handle that one. Maybe upon completion it toggles?
- Cutscene selection
- Turn off Dormin Hints
- Keep the Agro Death Glitch with the loading/draw distance
- Any/all bonus material that was strung across different promo discs and press kits that Nomad and others have ripped. Those would probably be a stretch, though.